Some previously checked domains:

10M+

High load prevented by load-balanced servers

99.9%

99.9% uptime, and FAST response

10+

Multiple heuristic methods to block bad e-mails

$0

Free API available

Our secure API is free to use

Just verifying an e-mail with a regular expression or blocking specific domains isn't enough. Stop spamming and trolls once and for all.

Our API uses a combination of blacklists and advanced heuristics to check if a domain is valid, or if it could potentially cause issues. The API is free to use for almost everyone, but we have larger plans, if you need to check many addresses.